7823121 has 8 divisors (see below), whose sum is σ = 10586784. Its totient is φ = 5137440.

The previous prime is 7823113. The next prime is 7823131. The reversal of 7823121 is 1213287.

7823121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7823121 - 2³ = 7823113 is a prime.

It is a super-2 number, since 2×7823121² = 122402444361282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7823091 and 7823100.

It is not an unprimeable number, because it can be changed into a prime (7823131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19260 + ... + 19661.

It is an arithmetic number, because the mean of its divisors is an integer number (1323348).

Almost surely, 2^7823121 is an apocalyptic number.

It is an amenable number.

7823121 is a deficient number, since it is larger than the sum of its proper divisors (2763663).

7823121 is a wasteful number, since it uses less digits than its factorization.

7823121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38991.

The product of its digits is 672, while the sum is 24.

The square root of 7823121 is about 2796.9842688153. The cubic root of 7823121 is about 198.5150096406.

The spelling of 7823121 in words is "seven million, eight hundred twenty-three thousand, one hundred twenty-one".